60" plus riggers? How about 72"?

[Shawn]

Anyone ever build or know of any riggers that are 72" long? I've seen some pretty large cats out there.

Working on/redesigning a zenoah gas powered outrigger that needs to be brushless and lipo.

Trying to search but I'm mobile and well, tapatalk search functions kinda stink.

Thanks for any help!

[Shawn]

Just a follow-up to my own post, I'm home now and finding some info on the forums for larger hulls. Love this place!

But, if anyone has some large scale rigger (60" up to 72") info they wouldn't mind sharing I'd still appreciate it!

[Chilli]

I think most riggers are designed for racing. The max size for the IMPBA is 60 inches. Don't know about NAMBA. So info may be hard to find. I'm pretty sure they run larger riggers in Asia but they are designed for rough open water. Good luck though. Hopefully someone can help you out.

[RaceMechaniX]

The max size for NAMBA is also 60". Due to our power limitations of 10S2P and available motor sizes going over 48" let alone 60" does not make a lot of sense. I built a 46" T Rigger for SAW events and was amazed how much power it consumed. By comparison, my Q rigger which is 39" needs half the power to go faster than the T rigger did.

A T rigger would require something along the lines of a Castle 2028, Neu 22XX, or Lehner 30XX. You could also use an outrunner like the big scorpion.

For reference, most of the twin gas riggers are still considerably below the 60" limit. It's really on the scale cat's that easily exceed the length limits.

Tyler

[Shawn]

Okay, thanks very much to both of you. It makes a lot more sense to know the reasons behind why there aren't many, in any, riggers that size. I had a feeling the solution may need to be found within a twin motor system design.

I see the scorpions you mentioned are used for large scale helicopters. That's the out of box thinking it will likely take to make it happen. Very much appreciated!

[Fluid]

The Scorpion motors are high quality and have a lot of torque - but they are not high-power motors compared to quality inrunners. The former are limited to 100-125 amps in most applications, which means they are down on power. They will simply not last long at the 170+ amps that good inrunners will thrive on. Trust me I know, I've burned up a few pushing them. These aircraft motors have very different demands placed on them than boat motors do. The outrunners do make a wonderful sound though, and I do like the Scorpions for mild sport setups.




.

[Shawn]

Okay more good tips for sure. I was surfing around this morning and it appears at first glance that big castle motor may be what we need. Turns out the old boat has a Mathe engine that ran approx 6hp at 25000 RPMs.

[Shawn]

If anyone is curious, I posted a video of the old 60" gas boat running in the videos forum.

[lp670]

where can I get one?

Thank you

[Shawn]

Hey lp!

It's a custom built test boat from my dad's company Hydrofoils Inc. Everything is self designed and built by him. He builds these models to test out design ideas for full size boats - www.hydrofoil.com

There are a few 100 24" electric kits out there that we MFG'd back in the mid 1990s but unfortunately very few have surfaced over about the last year and a half that I've been looking online.

[lp670]

Do they handle better than a rigger?

http://forums.offshoreelectrics.com/...s-rigger-build

Have you looked at Lehner motors?

[lp670]

Do they handle better than a rigger?

http://forums.offshoreelectrics.com/...s-rigger-build

Have you looked at Lehner motors? Or if you have $$$$$$ http://www.mhzusa.com/Gasturbines_c43.htm

[Shawn]

Yeah thanks to OSE help we checked out Lehner 3080, NEU 2200 and Castle 2028 series motors and probably liked the Castle the most.

Those turbines are sweet! Amazing what technology is out there these days.

The hydrofoil boats are extremely stable. We've never run head to head against riggers but I know at one time out boats were IMPBA legal versus similar spec riggers.

The main difference between our hydrofoils and riggers, hydroplanes, tunnel hulls and catamarans is how they all achieve lift. Hulls on riggers and more-so hydroplanes, etc. generate lift to achieve flight. These hulls act like wings, this is nothing new. The faster they go, hydroplanes can, will, and have to blow over at some point.

Our hulls produce downforce like Indy cars while the foils produce lift. So they get locked into a theoretical vacuum. Our hydrofoil boats will never blow over. If anything the faster they go the more downforce on the hulls, generated by air flow, takes place.

There are of course other stability factors with high speed travel and water but neither airflow nor lift is one of them in terms of these high speed hydrofoils.

Turtles, buoys and ducks...? Well... we're trying - driver error as they say.

(edited original post from iPhone)

[lp670]

Do you have any more photos of the 60 hydrofoil?http://www.youtube.com/watch?v=ljEaTyauQMU

Are they any good in the 5 inch chop? The castle is a lot more popular.

[Shawn]

There are a few pics on the website which is frankly a bit dated. Working on that too just not enough spare time.

https://www.hydrofoil.com

These two videos I've posted are probably our best public resource at the moment. My dad lives in south Florida and I am in north Florida. Too far apart to visit often. But I can say he's making more test runs and videoing each one. There will be more detailed video very soon, longer run times and close ups etc.

I've never run in heavy chop but it wasn't exactly glassy calm water when he ran the other day in that video. Especially after only two laps, he needs a bigger lake to open it up. :)